Can I add social login like Facebook connect, Gmail login, Twitter login, etc beside conventional login system (username/passwords system) on my website? If yes, how can I do that?
Yes, you can do it either by using their login APIs individually and setting up them properly at your website. To learn more about the APIs, please visit their developers document. else try third party solution providers like loginradius, gigya and others to integrate all of them in one go at your website. If you are using a popular CMS, then there will be a ready made plugin aleady available with these providers which totally reduces the effort and time. Hope this helps!!